UPDATE (WKOW) -- All lanes of US 51 northbound are back open after a crash in the town of Dunn.
DANE COUNTY (WKOW) -- All lanes of US 51 northbound near the town of Dunn are blocked because of a crash, according to the Wisconsin Department of Transportation.
Officials said at 7:20 a.m. on Wednesday lanes were blocked on US 51 at Dyreson Road.
Traffic is expected to be impacted until at least 9 a.m.
This is a developing story. Check back for updates.